The hard part is finding out if you managed to achieve it.

In Korea they sometimes hold mock funerals for those who have attempted suicide to help them grieve the situation.

You could always fake your own death and then visit the funeral, as in Kurosawa’s famous film The Bad Sleep Well.

https://youtu.be/-_DPoSV-nxM

Note that it's not completely impossible: most journals have already written eulogy of a lot of famous and old people

Tangentially related, I saw this movie recently and it was really touching: https://www.statnews.com/2020/10/01/her-father-developed-dem...

Nicole Perlroth did a great job writing this.